package ideas

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"

	"seo-optimizer/internal/agent"
	"seo-optimizer/internal/config"
	"seo-optimizer/internal/reddit"
	"seo-optimizer/internal/storage"
	"seo-optimizer/internal/wordpress"
	"seo-optimizer/pkg/models"
)

type fakeLLM struct {
	postIdeas           []*models.PostIdea
	outreachSuggestions []*models.OutreachSuggestion
}

func (f *fakeLLM) OptimizePost(ctx context.Context, post *wordpress.Post, internalPosts []*wordpress.InternalPostReference, categories map[int]string, tags map[int]string, options *agent.OptimizeOptions) (*models.OptimizationResponse, error) {
	return nil, nil
}

func (f *fakeLLM) GeneratePostIdeas(ctx context.Context, prompt string) ([]*models.PostIdea, error) {
	if f.postIdeas != nil {
		return f.postIdeas, nil
	}
	return []*models.PostIdea{
		{
			SEOTitle:  "Idea SEO",
			Summary:   "Summary",
			PrimaryKW: "keyword",
			Sources: []models.IdeaSource{{
				Title: "Reddit",
				URL:   "https://reddit.com/r/test",
			}},
			References: []string{"https://example.com"},
		},
	}, nil
}

func (f *fakeLLM) GenerateArticleDraft(ctx context.Context, prompt string) (*models.ArticleDraft, error) {
	return &models.ArticleDraft{
		Title:           "Draft",
		SEOTitle:        "SEO Draft",
		MetaDescription: "Meta",
		Excerpt:         "Excerpt",
		ContentHTML:     "<p>Content</p>",
	}, nil
}

func (f *fakeLLM) GenerateOutreachSuggestions(ctx context.Context, prompt string) ([]*models.OutreachSuggestion, error) {
	if f.outreachSuggestions != nil {
		return f.outreachSuggestions, nil
	}
	return []*models.OutreachSuggestion{}, nil
}

func (f *fakeLLM) GenerateNewsletterDraft(ctx context.Context, prompt string) (*models.NewsletterDraft, error) {
	return nil, nil
}

func TestGenerateDailyIdeasAndDraftsSpanishOnly(t *testing.T) {
	// Reddit server
	redditServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		resp := map[string]interface{}{
			"data": map[string]interface{}{
				"children": []map[string]interface{}{
					{"data": map[string]interface{}{
						"title":        "Post A",
						"url":          "https://reddit.com/r/test/a",
						"permalink":    "/r/test/comments/a",
						"selftext":     "Body",
						"author":       "user",
						"score":        50,
						"num_comments": 10,
						"created_utc":  1710000000,
						"subreddit":    "paternidad",
						"is_self":      true,
						"stickied":     false,
					}},
				},
			},
		}
		_ = json.NewEncoder(w).Encode(resp)
	}))
	defer redditServer.Close()

	// WordPress server for style samples
	wpServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodGet || r.URL.Path != "/wp-json/wp/v2/posts" {
			w.WriteHeader(http.StatusNotFound)
			return
		}
		posts := []map[string]interface{}{
			{
				"id":      1,
				"title":   map[string]interface{}{"rendered": "Sample"},
				"excerpt": map[string]interface{}{"rendered": "Excerpt"},
				"content": map[string]interface{}{"rendered": "Content"},
			},
		}
		_ = json.NewEncoder(w).Encode(posts)
	}))
	defer wpServer.Close()

	redditClient := reddit.NewClient(redditServer.URL, nil)
	wpClient := wordpress.NewClient(wpServer.URL, "user", "pass", 0, nil)

	ideasStore := storage.NewIdeaStorage(t.TempDir(), nil)
	if err := ideasStore.Initialize(); err != nil {
		t.Fatalf("init ideas storage: %v", err)
	}
	outreachStore := storage.NewOutreachStorage(t.TempDir(), nil)
	if err := outreachStore.Initialize(); err != nil {
		t.Fatalf("init outreach storage: %v", err)
	}

	cfg := config.IdeasConfig{
		Enabled:          true,
		IntervalHours:    24,
		Subreddit:        "paternidad",
		Listing:          "top",
		TimeRange:        "day",
		MaxRedditPosts:   5,
		MaxIdeas:         1,
		StyleSamplePosts: 1,
		MinScore:         10,
		MinComments:      1,
		BasePath:         t.TempDir(),
	}
	outreachCfg := config.OutreachConfig{
		Enabled: false,
	}
	profile := config.SiteProfile{
		Name:     "Padre Primerizo",
		URL:      "https://padreprimerizo.com",
		Topics:   []string{"Paternidad"},
		Audience: "Padres",
		Voice:    "Cercano",
	}

	svc := NewService(wpClient, &fakeLLM{}, redditClient, ideasStore, cfg, outreachStore, outreachCfg, profile, []string{"es"}, true, nil)

	ideas, err := svc.GenerateDailyIdeas(context.Background())
	if err != nil {
		t.Fatalf("GenerateDailyIdeas failed: %v", err)
	}
	if len(ideas) != 1 {
		t.Fatalf("expected 1 idea, got %d", len(ideas))
	}

	idea, err := svc.GenerateDrafts(context.Background(), ideas[0].ID)
	if err != nil {
		t.Fatalf("GenerateDrafts failed: %v", err)
	}
	if idea.ArticleES == nil {
		t.Fatalf("expected Spanish draft to be generated")
	}
	if idea.ArticleEN != nil {
		t.Fatalf("expected no English draft for es-only site")
	}
}

func TestGenerateOutreachSuggestionsDeduplicatesAndSkipsExistingLinks(t *testing.T) {
	redditServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		resp := map[string]interface{}{
			"data": map[string]interface{}{
				"children": []map[string]interface{}{
					{"data": map[string]interface{}{
						"title":        "Thread A",
						"url":          "https://www.reddit.com/r/kubernetes/comments/abc/thread_a/",
						"permalink":    "/r/kubernetes/comments/abc/thread_a/",
						"selftext":     "Need help with cluster setup",
						"author":       "user-a",
						"score":        100,
						"num_comments": 20,
						"created_utc":  1710000000,
						"subreddit":    "kubernetes",
						"is_self":      true,
						"stickied":     false,
					}},
					{"data": map[string]interface{}{
						"title":        "Thread B",
						"url":          "https://www.reddit.com/r/kubernetes/comments/def/thread_b/",
						"permalink":    "/r/kubernetes/comments/def/thread_b/",
						"selftext":     "How to debug networking",
						"author":       "user-b",
						"score":        120,
						"num_comments": 30,
						"created_utc":  1710000500,
						"subreddit":    "kubernetes",
						"is_self":      true,
						"stickied":     false,
					}},
				},
			},
		}
		_ = json.NewEncoder(w).Encode(resp)
	}))
	defer redditServer.Close()

	wpServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodGet || r.URL.Path != "/wp-json/wp/v2/posts" {
			w.WriteHeader(http.StatusNotFound)
			return
		}
		posts := []map[string]interface{}{
			{
				"id":      10,
				"slug":    "kubernetes-guide",
				"link":    "https://example.com/kubernetes-guide",
				"title":   map[string]interface{}{"rendered": "Kubernetes Guide"},
				"excerpt": map[string]interface{}{"rendered": "Guide excerpt"},
				"status":  "publish",
			},
		}
		_ = json.NewEncoder(w).Encode(posts)
	}))
	defer wpServer.Close()

	redditClient := reddit.NewClient(redditServer.URL, nil)
	wpClient := wordpress.NewClient(wpServer.URL, "user", "pass", 0, nil)

	ideasStore := storage.NewIdeaStorage(t.TempDir(), nil)
	if err := ideasStore.Initialize(); err != nil {
		t.Fatalf("init ideas storage: %v", err)
	}
	outreachStore := storage.NewOutreachStorage(t.TempDir(), nil)
	if err := outreachStore.Initialize(); err != nil {
		t.Fatalf("init outreach storage: %v", err)
	}

	// Existing suggestion for thread B should prevent regeneration for the same Reddit URL.
	if err := outreachStore.Save(&models.OutreachSuggestion{
		ID:                "existing-b",
		RedditURL:         "https://www.reddit.com/r/kubernetes/comments/def/thread_b/",
		RedditTitle:       "Thread B",
		ArticleTitle:      "Existing Article",
		ArticleURL:        "https://example.com/existing",
		SuggestedResponse: "Existing response",
		Status:            "new",
	}); err != nil {
		t.Fatalf("seed outreach suggestion: %v", err)
	}

	ideasCfg := config.IdeasConfig{
		Enabled:          true,
		IntervalHours:    24,
		Subreddit:        "kubernetes",
		Listing:          "top",
		TimeRange:        "day",
		MaxRedditPosts:   5,
		MaxIdeas:         1,
		StyleSamplePosts: 1,
		MinScore:         1,
		MinComments:      1,
		BasePath:         t.TempDir(),
	}
	outreachCfg := config.OutreachConfig{
		Enabled:        true,
		Subreddit:      "kubernetes",
		Listing:        "top",
		TimeRange:      "day",
		MaxRedditPosts: 5,
		MaxSuggestions: 5,
		MinScore:       1,
		MinComments:    1,
		MaxArticles:    10,
		BasePath:       t.TempDir(),
	}
	profile := config.SiteProfile{
		Name:     "Test Site",
		URL:      "https://example.com",
		Topics:   []string{"Kubernetes"},
		Audience: "Engineers",
		Voice:    "Technical",
	}

	llm := &fakeLLM{
		outreachSuggestions: []*models.OutreachSuggestion{
			{
				RedditURL:         "https://www.reddit.com/r/kubernetes/comments/abc/thread_a/",
				RedditTitle:       "Thread A",
				ArticleTitle:      "Kubernetes Guide",
				ArticleURL:        "https://example.com/kubernetes-guide",
				SuggestedResponse: "Helpful answer A.",
			},
			{
				// Duplicate of Thread A using a different URL shape should be deduplicated.
				RedditURL:         "https://old.reddit.com/r/kubernetes/comments/abc/thread_a/?utm_source=foo",
				RedditTitle:       "Thread A",
				ArticleTitle:      "Kubernetes Guide",
				ArticleURL:        "https://example.com/kubernetes-guide",
				SuggestedResponse: "Helpful answer A duplicate.",
			},
			{
				// Existing thread should be skipped.
				RedditURL:         "https://www.reddit.com/r/kubernetes/comments/def/thread_b/",
				RedditTitle:       "Thread B",
				ArticleTitle:      "Kubernetes Guide",
				ArticleURL:        "https://example.com/kubernetes-guide",
				SuggestedResponse: "Helpful answer B.",
			},
		},
	}

	svc := NewService(wpClient, llm, redditClient, ideasStore, ideasCfg, outreachStore, outreachCfg, profile, []string{"en"}, true, nil)

	generated, err := svc.GenerateOutreachSuggestions(context.Background())
	if err != nil {
		t.Fatalf("GenerateOutreachSuggestions failed: %v", err)
	}
	if len(generated) != 1 {
		t.Fatalf("expected 1 generated outreach suggestion, got %d", len(generated))
	}
	if generated[0].RedditURL != "https://reddit.com/r/kubernetes/comments/abc/thread_a" {
		t.Fatalf("unexpected canonical reddit url: %s", generated[0].RedditURL)
	}

	all, err := outreachStore.List("all")
	if err != nil {
		t.Fatalf("list outreach all: %v", err)
	}
	if len(all) != 2 {
		t.Fatalf("expected 2 total outreach suggestions (seed + new), got %d", len(all))
	}
}